Wales, 1924 vs 1929: seat-by-seat change

Every constituency in Wales compared between the 1924 and 1929 general elections: which seats changed hands and how far each swung.

Constituency	1924	1929	Majority	Con–Lab swing
Anglesey	Lib	Lib	21.1%	−15.0
Breconshire and Radnorshire	Con	Lab gain	0.4%	+4.2
Caernarvon District of Boroughs	Lib	Lib	31.8%	−13.9
Caernarvonshire	Lib	Lib	9.4%	−11.4
Cardiff Central	Con	Lab gain	4.2%	+10.1
Cardiff East	Con	Lab gain	7.0%	+8.7
Cardiff South	Con	Lab gain	12.1%	+10.8
Cardiganshire	Lib	Lib	20.9%	−19.8
Carmarthenshire Carmarthen	Lib	Lab gain	1.7%	−9.2
Carmarthenshire Llanelli	Lab	Lab	18.4%	−2.6
Denbighshire Denbigh	Lib	Lib	23.8%	+4.5
Denbighshire Wrexham	Lib	Lab gain	14.8%	−10.1
Flintshire	Con	Lib gain	8.0%	+7.2
Glamorganshire Aberavon	Lab	Lab	22.8%	−4.1
Glamorganshire Caerphilly	Lab	Lab	35.7%	+11.3
Glamorganshire Gower	Lab	Lab	25.1%	+11.3
Glamorganshire Llandaff and Barry	Con	Lab gain	5.1%	+8.7
Glamorganshire Neath	Lab	Lab	30.5%	+25.1
Glamorganshire Ogmore	Lab	Lab	27.5%	+23.2
Glamorganshire Pontypridd	Lab	Lab	16.4%	+15.6
Merionethshire	Lib	Lib	15.8%	−0.4
Merthyr Tydfil Aberdare	Lab	Lab	41.5%	−4.6
Merthyr Tydfil Merthyr	Lab	Lab	36.8%	+11.2
Monmouthshire Abertillery	Lab	Lab	37.5%	+27.9
Monmouthshire Bedwellty	Lab	Lab	57.9%	+29.0
Monmouthshire Ebbw Vale	Lab	Lab	33.5%	+23.7
Monmouthshire Monmouth	Con	Con	23.4%	+9.7
Monmouthshire Pontypool	Lab	Lab	15.1%	+17.0
Montgomeryshire	Lib	Lib	7.7%	−23.3
Newport	Con	Lab gain	6.0%	+5.8
Pembrokeshire	Con	Lib gain	10.6%	+6.3
Rhondda East	Lab	Lab	23.0%	+21.2
Rhondda West	Lab	Lab	39.2%	+28.1
Swansea East	Lab	Lab	23.2%	−4.2
Swansea West	Lib	Lab gain	2.0%	+8.3

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Official results House of Commons Library and UK Parliament election results data. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. How we use this data